MdeModulePkg: Create PCDs to be used in support of SEV-ES

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198

Two new dynamic MdeModulePkg PCDs are needed to support SEV-ES under OVMF:
  - PcdGhcbBase:       UINT64 value that is the base address of the GHCB
                       allocation.
  - PcdGhcbSize:       UINT64 value that is the size, in bytes, of the
                       GHCB allocation (size is dependent on the number of
                       APs).

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>

diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index d7572eedd18c7da9247758e226f0c3cf46d3d1d0..cb30a7975849b4da9f0fb682118c603326f3aadb 100644 (file)
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -2063,6 +2063,15 @@
   # @Prompt If there is any test key used by the platform.\r
   gEfiMdeModulePkgTokenSpaceGuid.PcdTestKeyUsed|FALSE|BOOLEAN|0x00030003\r
 \r
   # @Prompt If there is any test key used by the platform.\r
   gEfiMdeModulePkgTokenSpaceGuid.PcdTestKeyUsed|FALSE|BOOLEAN|0x00030003\r
 \r

+  ## This dynamic PCD holds the base address of the Guest-Hypervisor Communication Block (GHCB) pool allocation.\r
+  # @Prompt GHCB Pool Base Address\r
+  gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0|UINT64|0x00030007\r
+\r
+  ## This dynamic PCD holds the total size of the Guest-Hypervisor Communication Block (GHCB) pool allocation.\r
+  #  The amount of memory allocated for GHCBs is dependent on the number of APs.\r
+  # @Prompt GHCB Pool Size\r
+  gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0|UINT64|0x00030008\r
+\r

 [PcdsDynamicEx]\r
   ## This dynamic PCD enables the default variable setting.\r
   #  Its value is the default store ID value. The default value is zero as Standard default.\r
 [PcdsDynamicEx]\r
   ## This dynamic PCD enables the default variable setting.\r
   #  Its value is the default store ID value. The default value is zero as Standard default.\r

diff --git a/MdeModulePkg/MdeModulePkg.uni b/MdeModulePkg/MdeModulePkg.uni
index 5235dee561ad71961579211efb5dfc4a696b00e7..b8c867379a864c602342299b41dbf791ecc23f12 100644 (file)
--- a/MdeModulePkg/MdeModulePkg.uni
+++ b/MdeModulePkg/MdeModulePkg.uni
@@ -1303,3 +1303,11 @@
 #string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdTcgPfpMeasurementRevision_PROMPT #language en-US "TCG Platform Firmware Profile revision"\r
 \r
 #string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdTcgPfpMeasurementRevision_HELP #language en-US "Indicates which TCG Platform Firmware Profile revision the EDKII firmware follows."\r
 #string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdTcgPfpMeasurementRevision_PROMPT #language en-US "TCG Platform Firmware Profile revision"\r
 \r
 #string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdTcgPfpMeasurementRevision_HELP #language en-US "Indicates which TCG Platform Firmware Profile revision the EDKII firmware follows."\r

+\r
+#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdGhcbBase_PROMPT #language en-US "Guest-Hypervisor Communication Block (GHCB) Pool Base Address"\r
+\r
+#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdGhcbBase_HELP #language en-US "Used with SEV-ES support to identify an address range that is not to be encrypted."\r
+\r
+#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdGhcbSize_PROMPT #language en-US "Guest-Hypervisor Communication Block (GHCB) Pool Base Size"\r
+\r
+#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdGhcbSize_HELP #language en-US "Used with SEV-ES support to identify the size of the address range that is not to be encrypted."\r